Hotfix NPE in StorageLib

Signed-off-by: yoyosource <yoyosource@nidido.de>

BauSystem_Main/src/de/steamwar/bausystem/features/script/lua/libs/StorageLib.java

@@ -49,7 +49,7 @@ public class StorageLib implements LuaLib {
         global.set("get", new OneArgFunction() {
             @Override
             public LuaValue call(LuaValue arg) {
-                return GLOBAL_STORAGE.get(arg.checkjstring());
+                return GLOBAL_STORAGE.getOrDefault(arg.checkjstring(), NIL);
             }
         });
         global.set("set", new TwoArgFunction() {
@@ -58,7 +58,6 @@ public class StorageLib implements LuaLib {
                 return GLOBAL_STORAGE.put(arg1.checkjstring(), arg2);
             }
         });
-
         storageLib.set("global", global);
 
         LuaTable playerStorage = new LuaTable();
@@ -66,7 +65,7 @@ public class StorageLib implements LuaLib {
         playerStorage.set("get", new OneArgFunction() {
             @Override
             public LuaValue call(LuaValue arg) {
-                return playerStorageMap.get(arg.checkjstring());
+                return playerStorageMap.getOrDefault(arg.checkjstring(), NIL);
             }
         });
         playerStorage.set("set", new TwoArgFunction() {
@@ -82,7 +81,7 @@ public class StorageLib implements LuaLib {
         regionStorage.set("get", new OneArgFunction() {
             @Override
             public LuaValue call(LuaValue arg) {
-                return regionStorageMap.get(arg.checkjstring());
+                return regionStorageMap.getOrDefault(arg.checkjstring(), NIL);
             }
         });
         regionStorage.set("set", new TwoArgFunction() {